<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <meta name="geometry" content="diagram">
  <link rel="stylesheet" href="./assets/common.css">

  <title>dem demo</title>
  <style>
	#map { position:absolute; top:0; bottom:0; width:100%; }
  </style>
</head>

<body>
<div id = 'gui' style="position:absolute;top:0px;right:0px;z-index:2;"></div>
<div id="map"></div>
 <script src="https://webapi.amap.com/maps?v=1.4.8&key=15cd8a57710d40c9b7c0e3cc120f1200&plugin=Map3D"></script>
<script src="./assets/jquery-3.2.1.min.js"></script>
<script src="./assets/geotiff.browserify.min.js"></script>
<script src="../build/L7.js"></script>
<script>

const scene = new L7.Scene({
  id: 'map',
  viewMode: '3D',
  mapStyle: 'amap://styles/ba3e9759545cd618392ef073c0dfda8c?isPublic=true', // 样式URL
  center: [ 110.770672, 44.159869 ],
  pitch: 0,
  zoom: 3
});

scene.on('loaded', () => {

  const xhr = new XMLHttpRequest();
  xhr.open('GET', ' https://gw.alipayobjects.com/os/rmsportal/XKgkjjGaAzRyKupCBiYW.dat', true);
  xhr.responseType = 'arraybuffer';
  xhr.onload = function(e) {
    if (this.status === 200) {
    // get binary data as a response
      const blob = this.response;
      const tiff = GeoTIFF.parse(blob);
      const image = tiff.getImage();
      const values = image.readRasters()[0].values();
      const m = image.getHeight();
      const n = image.getWidth();
      const layer = scene.RasterLayer({ zIndex: 2 }).
      source(values, {
        parser: {
          type: 'raster',
          width: n,
          height: m,
          min: 0,
          max: 8000,
          extent: [ 73.482190241, 3.82501784112, 135.106618732, 57.6300459963 ]
        }
      })
       .style({
         rampColors: {
           colors: [ '#002466', '#0D408C', '#105CB3', '#1A76C7', '#2894E0', '#3CB4F0', '#65CEF7', '#98E3FA', '#CFF6FF', '#E8FCFF' ],
           positions: [ 0, 0.02, 0.05, 0.1, 0.2, 0.3, 0.5, 0.6, 0.8, 1.0 ]
         }
       })
      .render();
      console.log(layer);
     
    }
  };
  xhr.send();
});

</script>
</body>
</html>

